Internal co-seismic deformation and curvature effect based on an analytical approach

Internal co-seismic deformation and curvature effect based on an analytical approach
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基于解析方法的内部同震变形和曲率效应

DOI:
10.1007/s11589-017-0176-5
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发表时间:
2017-02
期刊:
影响因子:
1.2
通讯作者:
Wenke Sun
Wenke Sun
中科院分区:
地球科学4区
文献类型:
--
作者:
Jie Dong;Wenke Sun

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在本研究中,我们基于之前的方法提出了一种计算均匀球体内部同震变形的新方法(Dong et al. 2016)。在实际数值计算中,我们以走滑点源为例,计算了不同内球面(包括地球表面)上的垂直同震位移。数值计算结果表明,地震内部同震形变一般大于地表同震形变;其中,同震位移最大值出现在震源附近。震源位置上方和下方的同震位移符号相反。结果还表明,内部变形的曲率效应相当大,比地球表面的曲率效应更大。结果表明,在计算球内同震变形时,位错理论是必要的。
In this study, we present a new method to compute internal co-seismic deformations of a homogeneous sphere, based on our previous approach (Dong et al. 2016). In practical numerical computations, we consider a strike-slip point source as an example, and compute the vertical co-seismic displacement on different internal spherical surfaces (including the Earth surface). Numerical results show that the internal co-seismic deformations are generally larger than that on the Earth surface; especially, the maximum co-seismic displacement appears around the seismic source. The co-seismic displacements are opposite in sign for the areas over and beneath the position of the seismic source. The results also indicate that the curvature effect of the internal deformation is pretty large, and larger than that on the Earth surface. The results indicate that the dislocation theory for a sphere is necessary in computing internal co-seismic deformations.
DOI: 10.1029/92jb00178
发表时间: 1992-05-10
影响因子: 3.9
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OKUBO, S
通讯作者: OKUBO, S
DOI: 10.1111/j.1365-246x.1996.tb06530.x
发表时间: 1996-04
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